Unnamed Occurrence (ARDF - ID073; east of Guggenheim Creek), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Unnamed Occurrence (ARDF - ID073; east of Guggenheim Creek)	- not defined -
Iditarod Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: This occurrence is on a north-facing slope of an unnamed fork of Guggenheim Creek. The occurrence is about 4.2 miles north-northeast of the top of Camelback Mountain at an elevation of about 1,300 feet; it is about 0.3 mile west of the center of section 15, T. 29 N., R. 43 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence consists of a zone of unknown size that contains disseminated sulfides in an altered, iron-stained, mafic tuff at the base of the Beaver Mountains volcanic field (Bundtzen, Laird, and Lockwood, 1988; Miller and Bundtzen, 1994; Miller and Bundtzen, 1994, and Miller, Bundtzen, and Gray, 2005). One grab sample contained 100 parts per million (ppm) molybdenum, 500 ppm arsenic, 100 ppm copper, 1,100 parts per billion (ppb) mercury, 50 ppb silver, 30 ppm antimony, 1,000 ppm chromium, and 1,000 ppm nickel (McGimsey and others, 1988). The high values of chromium and nickel probably reflect background values of the mafic tuff. The other anomalous elements probably reflect epigenetic mineralization.
Workings: The area was sampled by the U.S. Geological Survey in the 1980s (McGimsey and others, 1988).
Alteration: The mafic volcanic rocks have been altered to carbonate minerals and iron oxides.

Commodities (Major) - As, Mo; (Minor) - Ag, Cr, Cu, Hg, Ni, Sb
Development Status: None

Other Databases

Link to USGS - Alaska:	ID073

Other Regions, Features and Areas containing this locality

References